Chills??

Starting Thursday night I started feeling kind of like I was coming down with something. I experienced some chills but they didn't last long. Yesterday I experienced chills again and they lasted for a few hours in the morning and came back in the evening. I was feeling like I was coming down with the flu maybe but I'm not sure... Today I also have had chills off and on and some mild body aches. Has anyone else experienced this? I'm 6 weeks 5 days today and worried as I've heard that the flu can be really bad when you're pregnant.